Answering the common buyer question: which rear sliding window gasket or replacement is best for 1973–1987 Chevy/GMC trucks and closely related models? This guide highlights five relevant products, each suited for classic pickups and similar rear sliding windows. Use cases vary from factory-original repairs to aftermarket back-slider installations. The picks below emphasize compatibility, seal quality, and ease of installation to help you choose confidently.
Summary of selected products
| Product | Brand | Best For | Compatibility Notes |
|---|---|---|---|
| NAGD Gasket for Aftermarket Rear Sliding Window Glass Back Slider | NAGD | Classic Chevrolet/GMC C-Series/K-Series pickups | 1973–1987 models listed |
| JEGS Rear Window Seal for 1973–1987 Chevrolet, GMC Truck | JEGS | Retro seals with lockstrip groove | Fits 1973–1987 trucks |
| Gasket for Aftermarket Rear Sliding Window Glass Back Slider (K&L) | K&L | Back slider glass replacements | 1973–1991 range noted |
| Rear Manual Sliding Glass Window (1988–1999 Chevy/GMC) | Generic | Later-era rear sliding windows | 1988–1999 models |
| Gasket for Rear Sliding Window Glass Back Slider (Toyota Pickup 1984–1995) | NAGD | Toyota pickup rear slider seals | 1984–1995; not a Chevy/GMC match |
Gasket for Aftermarket Rear Sliding Window Glass Back Slider (Chevy/GMC)
Brand: NAGD
Features include compatibility across multiple years and models in the 1973–1987 Chevy/GMC spectrum, and a focus on a back slider glass gasket in black. Best for buyers restoring first-generation C-Series, K-Series, or early R/V-series pickups where the back slider needs a dedicated gasket.
Best for: Classic Chevy/GMC truck restorers seeking a direct gasket replacement for the rear sliding window. Choose this if your model falls within the listed compatibility window and you need a dedicated back slider gasket.
Limitation: Data notes primarily list compatibility; ensure your exact window style matches the aftermarket back slider design before purchase.
JEGS Rear Window Seal for 1973–1987 Chevrolet, GMC Truck
Brand: JEGS
Features: Replaces the rear window seal with a trim groove for lockstrip; EPDM rubber; black; sold individually. Intended to provide a secure seal for 1973–1987 Chevrolet and GMC trucks with a lockstrip groove.
Best for: Buyers replacing a rear window seal on classic trucks where a lockstrip groove is present. Better for those who want a seal designed to align with the original groove geometry.
Limitation: Sold individually; ensure you have the correct seal thickness and groove type for your window frame.
Gasket for Aftermarket Rear Sliding Window Glass Back Slider (K&L)
Brand: K&L
Features: Fitment includes 1973–1980 C Series and K Series pickups, with 1981–1986 C10/C20 and K10/K20/K30, plus 1987–1991 R-series. Part is a gasket for aftermarket sliding back glass only.
Best for: Buyers with a late-80s style back slider seeking a gasket that matches multiple GM truck generations and a back glass only replacement.
Limitation: Verify exact model year window geometry, as this gasket is specified for multiple generations and may require precise alignment.
Rear Manual Sliding Glass Window for 1988–1999 Chevy/GMC
Brand: Generic
Features: Manual sliding non-heat glass window; non-heat; factory standard dark tint; suitable for C&K 1500, 2500, 3500 2-door standard/extended cab & 4-door crew cab variants.
Best for: Buyers working on 1988–1999 Chevy/GMC pickups who need a factory-style sliding glass window with dark tint for privacy.
Limitation: Not a perfect match for 1973–1987 models; best for later-generation trucks in the same brand family.
Gasket for Rear Sliding Window Glass Back Slider (Toyota Pickup)
Brand: NAGD
Features: Compatible with 1984–1995 Toyota Pickup 2 Door Standard Cab (not for extended cab or 1995 Tacoma); gasket for back slider only; color black.
Best for: Buyers restoring early Toyota pickups requiring a dedicated rear sliding back glass gasket.
Limitation: Not compatible with Chevy/GMC trucks; verify model compatibility before purchase.
Buying Guide
What to consider when choosing a rear sliding window gasket or replacement:
- Model compatibility: Confirm the exact year and model range (e.g., 1973–1987 C-Series/K-Series) to ensure a proper seal and fit.
- Seal type: Gasket-based seals versus full window seals; gasket replacements are typically easier for back slider glass replacements.
- Material durability: Look for EPDM or other synthetic rubbers designed for automotive exterior exposure and temperature cycling.
- Window configuration: Verify whether your vehicle uses a back slider glass, standard glass, or a lockstrip groove for installation.
- Installation effort: Some seals are sold as individual pieces; others may require additional hardware or trim alignment.
- Tint and aesthetics: If you want privacy and UV protection, consider factory dark tint options where available.
Frequently asked questions
- Q: Will a gasket for 1973–1987 trucks fit all models in that range?
A: Not automatically. Check specific model (C-Series vs K-Series) and year ranges to ensure compatibility with your back slider configuration. - Q: Are these gaskets universal for back sliders?
A: Most are designed for specific generations or back sliders; verify vehicle compatibility and groove type before purchase. - Q: Can I install a 1988–1999 rear sliding window on a 1973–1987 truck?
A: No, due to differences in window frame architecture and mounting geometry. Use parts designed for your year. - Q: Do these products include mounting hardware?
A: Most gasket products focus on the seal itself; some listings indicate sold individually or as part of a larger assembly. Check the listing details. - Q: Is EPDM the preferred material for rear window gaskets?
A: Yes, EPDM is common for automotive seals due to its durability and resistance to weathering. - Q: Should I expect a perfect factory look after replacement?
A: Replacement gaskets aim to restore sealing but may not perfectly match every original contour; consider trims and finishes for best aesthetics.